X波段双偏振天气雷达组网反射率因子订正研究

Study on Reflectivity Factor Correction of X-band Dual Polarization Weather Radar Network

X波段双偏振天气雷达具有造价低、探测精度高等特点,能够在业务应用上与常规天气雷达形成互补作用,但由于其波长较短,电磁波经过雨区时会发生衰减。因此,对组网前的单部雷达反射率因子进行适当订正处理,再依据S波段天气雷达波长较长、电磁波经过雨区时衰减更小的特点设计算法对组网区域的反射率因子进行协同对比订正。实验结果表明,设计算法能够对组网反射率因子进行有效订正。

X-band dual polarization weather radar is characteristic of low cost and high detection accuracy,which can make up for the shortcomings of conventional weather radar in business application,but because of its short wavelength,the electromagnetic wave will attenuate when it passes through the rain area.Therefore,this paper first corrects the reflectivity factor of a single radar before networking,and then designs an algorithm to compare and correct the reflectivity factor of the netted area.In order to analyze the effect of the algorithm,the data ofa S-band weather radar which has a longer wavelength and less attenuation when passing through a rainy area is selected for comparison with the results of the network correction.The results show that the algorithm designed in this paper can correct the reflectivity factor effectively.